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Troy-Bilt TB90BC Operator's Manual

2 -cycle gasoline
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Operator's Manual
2 - Cycle Gasoline
Brushcutter
Model
TB90BC
IMPORTANT:
READ SAFETY RULES AND INSTRUCTIONS
CAREFULLY
P/N 769-00662 (3/03)
PRINTED IN USA

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Summary of Contents for Troy-Bilt TB90BC

  • Page 1 Operator's Manual 2 - Cycle Gasoline Brushcutter Model TB90BC IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY P/N 769-00662 (3/03) PRINTED IN USA...
  • Page 2 Content Page Calling Customer Support ............. Rules for Safe Operation ............. Z, n ow Your Unit ............Assembly Instructions ............Oil and Fuel Information ............. Starting/Stopping Instructions ..........Operating Instructions ............Maintenance and Repair Instructions .......... Cleaning and Storage ............Accessories and Replacement Parts ...........

  • Page 3: Before Operating

    SYMBOL MEANING The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and their explanations, deserve your careful attention and understanding. The safety warnings do not by will result in serious injury to yourself or to DANGER: Failure to 0bey a safetywaming themselves eliminate any danger.

  • Page 4: While Operating

    WHILE OPERATING • Always stop the engine when cutting is delayed or when walking from one cutting location to another. • Never start or run the unit inside a closed room or building. Breathing exhaust fumes can be fatal. • If you strike or become entangled with a foreign Operate this unit only in a well-ventilated outdoor area.

  • Page 5: Other Safety Warnings

    • Do not run the unit at high speed when not cutting. • Lock up and store the cutting blade _nan appropriate area to protect the blade from unauthonzed use or • if you strike or become entangled with a foreign damage.
  • Page 6 SAFETY AND INTERNATIONAL SYMBOLS This operator's manual describes safety and international symbols and pictographs that may appear On this product. Read the operator's manual for complete safety, assembly, operating and maintenance and repair information. SYMBOL MEANING SYMBOL MEANING • ON/OFF STOP CONTROL Indicates danger, warning or caution.
  • Page 7 • Cutting weeds and light brush of up to 1/2 inch in Starter Rope Grip diameter Shaft Grip -_ Other optional accessories may be used with the TB90BC. Refer to Operating the EZ-Link System for a Throttle list of add-ons. Lock-Out Throttle...

  • Page 8: Install The Harness

    INSTALL HARNESS On some units, the J-handle may be pre-installed. In this case you must loosen screws and adjust the handle to fit the operator. Go to step 5 if the J-handle is pre-installed. WARNING: Always use the shoulder harness when using the cutting blade to INSTALL AND ADJUST THE J-HANDLE avo d serous...
  • Page 9 Hold the locking rod in place by grasping it next to Cutting the boom of the unit (Fig. 9). Screws Attachment Shield While holding the locking rod, remove the cutting attachment by turning it clockwise off of the output shaft (Fig.

  • Page 10: Remove The Cutting Blade And Install The Cutting Attachment

    REMOVE THE CUTTING BLADE AND 5. Make sure that the cutting blade is centered on the pilot step and sitting f!at against the output shaft INSTALL THE CUTTING ATTACHMENT bushing (Fig. 12), WARNING: TO avoid serious personal I Allk l injury, always wear gloves while handling or Allk I center, the unit will vibrate and the blade I l installing the blade.
  • Page 11 OIL AND FUEL MIXING INSTRUCTIONS Thoroughly mix the proper ratio of 2-cycle engine oil with unleaded gasoline in a separate fuel can. Use a 40:1 Old and/or improperly mixed fuel are the main reasons fuel/oil ratio. Do not mix them directly in the engine fuel for the unit not running properly.

  • Page 12: Starting Instructions

    ventilated outdoor area. Carbon monoxide exhaust Start/On fumes can be lethal in a confined area. WARNING_ Operate this unit only well_ WARNING: Avoid accidental starting. Make sure you are in the starting position when pulling the starter rope (Fig. 18). To avoid serious injury, the operator and unit must be in a stable position while Throttle To avoid serious personal injury, ensure any...
  • Page 13 OPERATING THE EZ-LINK SYSTEM While firmly holding the add-on, push it straight into the EZ-Link coupler (Fig. 20). The EZ-Link system enables the use of these optional Add-Ons: NOTE: Aligning the release button with the guide recess will help installation (Fig. 19). Blower/Vacuum ......

  • Page 14: Holding The Trimmer

    HOLDING THE TRIMMER Each time the head is bumped, about 1 inch (25.4 mm) of trimming line is released. A blade in the cutting attachment shield will cut the line to the proper length if excess line is released. and body protection to reduce the tisk of _[WARNING: Always wear eye, hearing, foot For best results, tap the Bump Head...

  • Page 15: Decorative Trimming

    DECORATIVE TRIMMING the engine is turned off. The coasting blade Decorative trimming is accomplished by removing all ARNING: The blade Continues to Spin after vegetation around trees, posts, fences and more. can seriously cut you if accidentally touched. Rotate the whole unit so that the cutting attachment is at •...

  • Page 16: Maintenance Schedule

    MAINTENANCE SCHEDULE NOTE: Maintenance, replacement, or repair of the emission control devices and system may be Perform these required maintenance procedures at the performed by any non-road engine repair frequency stated in the table. These procedures should establishment, individual or authorized service also be a part of any seasonal tune-up.
  • Page 17 For Use with SplitLine Insert the end of the line into the open hole in the For Use with Single Line ONLY or Single Line inner reel and pull the line tight to make the loop as small as possible (Fig. 33). Slotted Holes 10.

  • Page 18: Installinga Prewound Reel

    INSTALLING A PREWOUND REEL Cleaning the Air Filter Clean and re-oil the air filter every 10 hours of operation. Hold the outer spool with one hand and unscrew the It is an important item to maintain. Failure to maintain the bump knob clockwise (Fig.

  • Page 19: Spark Arrestor

    Reinstalling the Air Filter/Muffler Cover Place the air filter/muffler cover over the back of the carburetor and muffler. Align the screw holes. Spark Exhaust Arrestor Gasket Insert the four (4) screws into the holes in the air filter/muffler cover (Fig. 36) and tighten. Do not over tighten.

  • Page 20: Carburetor Adjustment

    CARBURETOR ADJUSTMENT NOTE: The cutting attachment should not rotate when the engine idles. The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 43). If the cutting attachment rotates when the engine idles, turn the idle speed screw counterclockwise NOTE: Careless adjustments can seriously damage your 1/8 of a turn at a time (as needed), to reduce idle unit.

  • Page 21: Long Term Storage

    CLEANING TRANSPORTING • Allow the engine to cool before transporting. WARNING: TO avoid serious personal injury, I • Drain fuel from unit. "_, I always turn your trimmer off and allow it tO I [_[COO before you c ean or serv ce t. •...
  • Page 22 CAUSE ACTION Empty fuel tank Fill fuel tank with properly mixed fuel Primer bulb wasn't pressed enough Press primer bulb fully and slowly 10 times Engine is flooded Squeeze the trigger and pull the starter rope Old or improperly mixed fuel Drain gas tank and add fresh fuel mixture Fouled spark plug Replace or clean the spark plug...
  • Page 23 Engine Type ............................Air-Cooled, 2-Cycle Stroke ..............................1.25 in. (31.75 mm) Displacement .............................. 1.9 cu in. (31 cc) Clutch Type ................................. Centrifugal Idle Speed RPM ............................2,800 - 4,000 rpm Operating RPM ..............................7,200+ rpm Ignition Type ................................Electronic Ignition Switch ............................... Rocker Switch Spark Plug Gap ............................
  • Page 25 • Repair or replacement of warranted part will be performed at no charge to the owner at an Authorized Troy-Bilt Service Center. For the nearest location please contact Troy-Bilt at: 1-800-520-5520.
  • Page 26 ENGINE PARTS - MODEL TB90bc 2-CYCLE GAS TRIMMER/BRUSHCUTTER Item Part No. Item Part Description Description 753-1192 753q203 Starter Housing Assembly Air Cleaner/Muffler Cover Assembly (includes 23_30, 32 & 37) (includes 2 & 37) 79%181862 Housing Screw 791-180350B Air Cleaner Filter...
  • Page 27 ® ® Item Part Descri#tion 753*04118 Throttle Housing & Trigger Assembly (includes 2*5) 791-00041 Throttle Trigger Lock*Out 753*04119 ThrotBe Trigger 791-182690 Throttle Trigger Spring 791-182405 Switch Assembly 753*04136 ThrotBe Cable 791-610327 Harness Clip 753*04236 Upper Drive Shaft Housing Assembly 791-181099 J-Handle Assembly (includes 10 &...
  • Page 28 (90) days from the date of original retail for related expenses, or for rental expenses purchase for any Troy-Bilt product that is used for rental or temporarily replace a warranted product. (Some states commercial purposes, or any other income-producing do not allow limitations on how long an implied warranty purpose.

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